Kowari 1.0.3 is now available for download. Loading RDF/XML with blank nodes is now faster, inserting statements with blank nodes now works correctly, and blank nodes in Jena are now properly mapped. There are other things. It's annoying that RDF has named things (about) and unnamed things (blank nodes) and locally named things (blank nodes with node IDs). iTQL adds variables which are differently labelled blank nodes too.
The next release should have some inferencing and resolver work done to it which will be a major change to the architecture - unless we find some critical bug.
Paul has also updated the plans for a new triple store for Kowari/JRDF. I'm favouring the second approach but they both have positives and negatives. The ring structure has some advantages over the current structure (and the first approach) as it greatly reduces the amount of disk usage. I think bloom filters have been put on the back burner.